Howard Zinn.
A Power Governents Cannot Suppress.
San Francisco: City Lights Books, 2007.

Book information: publisher, Google Book Search, Amazon.com.

Howard Zinn, Wikipedia.

HowardZinn.org (his website).

Conversations with History - Howard Zinn - 20 April 2001.
"Radical History."
Harry Kreisler, Institute of International Studies, University of California at Berkeley.

Zinn is probably best known for his book A People's History of the United States.
See more about that book at: Wikipedia; Google Book Search; Amazon.com.

Recently, a "graphic adaptation" of A People's History of the United States was published as A People's History of American Empire.
See more about that book at: the publisher; Google Book Search; Amazon.com.